Musical-instrument bellows.



R. A. GALLY. MUSIUAL INSTRUMENT BELLOWS. APPLICATION FILED JUNE 29.1912.

6 Fig. 2 5 \I 7 "ii Z I: iZ1TZiZZiiTIIE ifi l I l f UNITED snares re a ners on m ROBERT A. GALLY, OF CINCINNATI E, OHIO, ASSIGNOR EEG THE BALDWIN GGMYANY, 13F CINCINNATI, OHIO.

MUSICAL-INSTRUMENT BELLOWS.

Specification of Letters Patent.

Patented Mar. 18, seas.

Application filed {une 29, 1912. Serial No. 706,600.

To all whom it concern;

Be it known that I, ROBERT GALLY, a citizen of the United States, residing at Cincinnati, in the county of Hamilton. State of Ohio, have invented certain new and useful Improvements in Musical-In strument Bellows. of which the following is a. specification.

In my prior application #653,638, filed October 9th, 1911, is set forth a bellows with its moving board having motion in parallel planes during the first part oi its motion, but interrupted during the latter part of it motion at one of its ends by an interrupting block or similar means near that end, and having its latter motion eontinned at the other end.

In the present application no block is used, the two motions being secured by the slanted angular form of the reservoir covering.

In the present drawings Figure l a front. view of the bellows with the reservoir cut open to show the spring; Fig. 2 is the same reservoir at the end of the parallel action of its first motion; Fig. 3 shows the reservoir in the second stage of action, having one end without motion.

By a chest 1, or in other suitable manner, pumpers 2 and 3 are combined with a reservoir 4 having its moving board 5 lying in .a line from G to 7 at. an angle to its op posite fixed part, as thepresent chestl, collapsible cover 8 thereby having a greater surface between its two angular lines at one end of the reservoir than at the other end. 7

The expansion spring 9 is positioned bo tween the opIWSe-d fixed and movable'parts of the reservoir with its active prongs or ends 10 engaging themselves with the moving board 5 3 flpoint nearer the wider open end 6 than the closer end 7 of the reservoir 4. thus exerting its tension on the moving board 5 distributed in a proportion varying from one end to the other of the moving board 5 similar to the varied pull exerted by the ditierent widths of cover 8 added to the total pull of area of moving board 5, as the partial vacuum of air acts on the reservoir when the pumpcrs 2 and 3 draw air therefrom. With this construction, the first part of motion of the moving board 5 is in planes substantially parallel to its original slanted position until its closer end 7 ha touched the chest 1 or other fixed part, the remaining motion of the moving board 5 continuing at its more open end (3, the board then moving as a lunged member tulcrumed at 7. Thus while there is no sudden jump of tension at the time of change of motion from parallel to hinged action. the speed of change is made twice as fast on the hinged motion of the higher tensions than with the parallel motion of the lower tensions, which best suits a perfeet control of dynamic expression of the playing of autopneumatic piano playing devices and other structures requiring a sensitive variation of air tension. i

It will be understood that in the structure here shown the tension of air in the reservoir changes at every step of the motion of its moving board owing to the increased tension of spring; 9 as it is compressed, and

the accompanying reduction of affective area and leverage of the cover 8 as it folds in with the collapse of the reservoir.

What I claim as my invention, is:

1. A musical instrument bellows reser voir having a fixed part and an oppositely positioned bodily movable board, the fixed part and movable board standing at an angle one to the other at the normal position of rest of the movable board with a space between said fixed board and movable board on all four sides thereof, and a collapsible cover attached across the space between the fixed part and then'iovable board around all four sides thereof and collapsible on all said four sides, an expansion spring between said fixed part. and movable board having its bearings thereon nearer to the wider open end of said angle than to the narrower end of said angle, and pumper means combined with said reservoir and adapted to draw air therefrom and thereby collapse aid reservoir. v I

2. A musical instrument bellows reservoir having a fixed part and an oppositely positioned bodily movable board, the fixed part and movable board standing at an angle one to the other at the normal position of rest of the movable board, and a collapsible cover attached across the space between the fixed part and the movable board around all four sides thereof and collapsible on all said four sides during the first partof the motion of the movable board, but collapsible n only threeoi said sides during the second part of said motion, and pumper means combined with said reservoir and adapted to draw air therefrom and thereby collapse said reservoir.

8. A musical instrument bellows reservoir having a fixed part and an oppositely posi tioned bodily movable board, the fixed part and movable board standing atan angle one to the other at the normal position of rest of the movable board, and a collapsible cover attached across the space between the fixed part and the movable board around all four sides thereof and collapsible on all said four sides during the first part of the motion of the movable board, but not collapsible on one of said four sides during the second part of said motion, and pnmpeimeans combined with said reservoir and adapted to draw air therefrom and thereby collapse said reservoirf 4. A musical instrument-bellows reservoir having a fixed part and an oppositely positioned bodily movable board, the fixed part and movable board standing at an angle one to the other at the normal position of rest of the movable board, and a collapsible cover attached across the space between the fixed part and the movable board around all four sides thereof and collapsible on all said four sides during the first part of the motion of the movable board, but collapsible on only three of said sides during the second part of said motion, the end of the movable board at the converging end of said angle being in contact with the fixed part during the second part of said motion, and pumper means combined with said reservoir and adapted to draw air therefrom and thereby collapse said reservoir.

5. A musical instrument bellows reservoir having a fixed part and an oppositely positioned bodily'movable board, the fixed part and movableboard standing atan angle one to t-heother at. the normal position of rest of the movable board, and a collapsible cover attached'across the space between the fixed part and the movable board around all four sides thereof and collapsible on all said four sides during the first part. of the motion of the movable board, but not collapsible on one of said four sides during the second part, of said motion, the end of the movable board at the converging end of said angle being in contact with the fixed part during the second part of said motion, and pumpe-r means combined with said reservoir and adapted to draw air therefrom and thereby collapse said reservoir.

6. A musical instrument bellows reservoir having a fixed part and an oppositely positioned bodily movable board, the fixed part and movable board standing at an angle one to the. other at the normal position of rest of the movable board, and a collapsible cover attached across the space between the fixed part and the movable board around all four sides thereof and colone to the other at the normal position of rest of the movable board, and a collapsible cover attached acrossthe space between the fixed part and the movablejboard around all four sides thereof and collapsible on all said four sides during thefirst part of the motion of the movable board, but collapsible on only three of said sides during the second part of said motion, the first part of the motion of said movable board being in parallel planes, and the second part of said motion being at varying angles to the fixed part, and pumper means combined with-said reservoir and adapted to draw air therefrom and thereb collapse said reservoir. 5

S. A musical instrument bellows reservoir having a fixed part and an oppositely positioned bodily movable board, the fixed part and movable board standing at an angle one to the other at the normal position of rest of the movable board, and a collapsible cover attached across the space between the fixed part and the movable board around all four sides thereof and collapsible on all said four sides during the first part of the mo- .tion of the movable board, but collapsible on only three of said sides during the second part of said motion, an expansion-spring between said fixed part. and movable board having its bearings thereon nearer to the. wider open endof said angle than to the narrower end of said angle, and pumper means combined with said reservoir and adapted to draw air therefrom and thereby collapse said reservoir.

ROBT. A GALLY. Witnesses:

S. M. VVAMAoKs, J. Macy. 

